OBD Guide
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P1264

Cylinder #4 High To Low Side Short

P1264 is an OBD-II diagnostic trouble code meaning: Cylinder #4 High To Low Side Short. Common causes: damage to high voltage wires, ignition coil malfunction. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Misfire in cylinder 4
  • Unstable engine operation
  • Reduced engine power
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Damage to high voltage wires
  • Ignition coil malfunction
  • Short circuit in wiring harness
  • Problems with the engine control unit
  • Damage to the insulation of ignition system components

How to Fix

  1. Check the condition of the high-voltage wires of the 4th cylinder
  2. Check the functionality of the ignition coil
  3. Inspect the wiring harness for damage
  4. Check the resistance and continuity of the ignition circuit
  5. If necessary, replace faulty components

Related codes

P0304P0354P0350

Error P1264 by Vehicle Brand

FordLincolnMercury

FAQ

What does the P1264 code mean?

P1264 is an OBD-II diagnostic trouble code that indicates: Cylinder #4 High To Low Side Short

What causes a P1264 error code?

The most common causes of P1264 include: Damage to high voltage wires; Ignition coil malfunction; Short circuit in wiring harness; Problems with the engine control unit.

How do I fix a P1264 diagnostic trouble code?

To fix P1264: Check the condition of the high-voltage wires of the 4th cylinder. Check the functionality of the ignition coil. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1264?

Limited driving only, diagnose soon

How much does it cost to fix P1264?

The estimated repair cost for P1264 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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